Note: Our manual does include a series of high frequency digraphs at the beginning of Blue Series. Some may find it confusing because these digraphs appear again in Green Series along with other phonograms later on.

We found this invaluable to us to that they included high frequency digraphs like "th" "sh" and "ch" among others, in that they helped our children to progress in reading other material far more quickly than if these high frequency digraphs had been withheld until Green Series. It is your choice to use them or not at home.